I wanted to see if anyone knew if you had to buy two kits to do this, because at $400 a piece, that's pretty expensive. From what I read the headlights are H1's for the 04 headlights and H3's for the fogs. Is there a way so I don't have to get two kits to do a whole conversion?

It would seem unlikely that 2 kits would be needed. Now you are at a price close to just buying real HIDs. The Bugeye JDM HID can be had for about $800 and the EDM for $900. Have you checked the price to swap to STi lights instead? I have never seen any aftermarket HIDs for the 04-05 only the Bugeyes.

I have the 04 WRX and I have the HID kit for my car, all I have to say is HOLY CRAP these things are soooooo much brighter!!! They cost me about 500.00. If you do the head lights you won't need to do the fog lights. the HID's are brighter that the high beams! Yes you do have to buy a seperate kit for the fog lights.